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2 papers tagged “ligo”

PhysicsPhysical Review Letters · Oct 2017 Open access

GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

B. P. Abbott, R. Abbott and T. D. Abbott

This paper reports the first detection of gravitational waves from the inspiral of a binary neutron star system, event GW170817, observed on 17 August 2017 by Advanced LIGO and Advanced Virgo. The signal lasted far longer than previous black-hole mergers, consistent with low-mass compact objects. The detection, coincident with a short gamma-ray burst and subsequent electromagnetic follow-up, inaugurated multimessenger astronomy with gravitational waves.

gravitational wavesneutron starsligovirgo
PhysicsPhysical Review Letters · Feb 2016 Open access

Observation of Gravitational Waves from a Binary Black Hole Merger

B. P. Abbott, R. Abbott and T. D. Abbott

This paper reported the first direct detection of gravitational waves, recorded on 14 September 2015 by the two LIGO interferometers as the signal GW150914. The observed waveform swept upward in frequency from 35 to 250 Hz and matched general-relativity predictions for the inspiral, merger, and ringdown of a binary black hole system, detected with a matched-filter signal-to-noise ratio of 24 and a significance greater than 5.1σ. The source was inferred to be the merger of black holes of about 36 and 29 solar masses into a final black hole of about 62 solar masses, radiating roughly 3 solar masses of energy as gravitational waves.

gravitational wavesblack holesgeneral relativityligo